#!/bin/sh

#

# This file is run on a daily basis to perform a backup of your

# mailbox list which can be used to recreate mailboxes.db from backup.

# Restore is done using ctl_mboxlist after uncompressing the file.

BACKDIR="/var/lib/imap/backup"

MBOXLIST="${BACKDIR}/mboxlist"

ROTATE=6

# fallback to su if runuser not available

if [ -x /sbin/runuser ]; then

  RUNUSER=runuser

else

  RUNUSER=su

fi

# source custom configuration

if [ -f /etc/sysconfig/cyrus-imapd ]; then

  . /etc/sysconfig/cyrus-imapd

fi

[ -x /usr/lib/cyrus-imapd/ctl_mboxlist ] || exit 0

[ -f /var/lib/imap/db/skipstamp ] || exit 0

# rotate mailbox lists

seq $[ $ROTATE - 1 ] -1 1 | while read i; do

  [ -f ${MBOXLIST}.${i}.gz ] && mv -f ${MBOXLIST}.${i}.gz ${MBOXLIST}.$[ $i + 1 ].gz

done

[ -f ${MBOXLIST}.gz ] && mv -f ${MBOXLIST}.gz ${MBOXLIST}.1.gz

# export mailboxes.db

$RUNUSER - cyrus -s /bin/sh -c "umask 077 < /dev/null ; /usr/lib/cyrus-imapd/ctl_mboxlist -d | gzip > ${MBOXLIST}.gz"

exit 0

# EOF